移除数据录入模块，持仓数据跟随种子数据加载

ft-app/app/templates/base.html

@@ -198,9 +198,6 @@
     <a href="/analysis/" class="{% if active_nav == 'analysis' %}active{% endif %}">
       <span class="icon">⚔️</span> 博弈分析
     </a>
-    <a href="/input/" class="{% if active_nav == 'input' %}active{% endif %}">
-      <span class="icon">📝</span> 数据录入
-    </a>
     <a href="/admin/" class="{% if active_nav == 'admin' %}active{% endif %}">
       <span class="icon">⚙️</span> 系统管理
     </a>

ft-app/app/templates/input.html

@@ -1,45 +0,0 @@
-{% extends "base.html" %}
-{% block title %}数据录入{% endblock %}
-{% block heading %}数据录入{% endblock %}
-{% block breadcrumb %}机构持仓录入{% endblock %}
-
-{% block content %}
-<div class="form-card">
-  <div class="section-title">持仓快照</div>
-  <form method="post" action="/input">
-    <div class="form-group">
-      <label>机构</label>
-      <select name="institution" required>
-        {% for inst in institutions %}
-        <option value="{{ inst }}">{{ inst }}</option>
-        {% endfor %}
-      </select>
-    </div>
-
-    <div class="form-group">
-      <label>方向</label>
-      <select name="direction" required>
-        <option value="long">多单</option>
-        <option value="short">空单</option>
-      </select>
-    </div>
-
-    <div class="form-group">
-      <label>日期</label>
-      <input type="date" name="date_str" required>
-    </div>
-
-    <div class="form-group">
-      <label>持仓量（手）</label>
-      <input type="number" name="position" required placeholder="例: 193030">
-    </div>
-
-    <div class="form-group">
-      <label>持仓均价</label>
-      <input type="number" name="avg_cost" step="0.01" required placeholder="例: 995.26">
-    </div>
-
-    <button type="submit" class="btn btn-primary">提交</button>
-  </form>
-</div>
-{% endblock %}